import java.util.Scanner;

/**
* This program implements the given
* decision tree to arrive on the meal
* decision.
*/
public class MealPrep {

public static void main(String[] args) {
   // Single scanner object
   Scanner scanner = new Scanner(System.in);
   // Printing welcome message.
   System.out.println("Welcome to the Meal Prep Program. Let's see what you can make.");

   // Asking first question.
   System.out.println("Do you have any meat?");
   String response = scanner.nextLine();

   // Checking if response is "yes", if user has meat.
   if (response.equalsIgnoreCase("yes")
            || response.equalsIgnoreCase("y")) {

         System.out.println("Do you have beef, chicken, or other meat?");
         response = scanner.nextLine();
         response = response.toLowerCase();

         // Checking cases if user have beef, chicken, or other meat.
         switch (response) {
            case "beef":

               System.out.println("Do you have steak, ground, or roast?");
               response = scanner.nextLine();
               response = response.toLowerCase();

               switch (response) {
                     case "steak":

                        System.out.println("Do you have any Potatoes?");
                        response = scanner.nextLine();
                        // Checking if response is "yes", if user has Potatoes.
                        if (response.equalsIgnoreCase("yes")
                                 || response.equalsIgnoreCase("y")) {

                           System.out.println("Do you have any Salad?");
                           response = scanner.nextLine();
                           // Checking if response is "yes", if user has Salad.
                           if (response.equalsIgnoreCase("yes")
                                    || response.equalsIgnoreCase("y")) {
                                 System.out.println("You should make Steak, Baked Potato and Salad");
                           } else if (response.equalsIgnoreCase("no")
                                    || response.equalsIgnoreCase("n")) {

                                 System.out.println("Do you have any Fruit?");
                                 response = scanner.nextLine();
                                 // Checking if response is "yes", if user has Fruit.
                                 if (response.equalsIgnoreCase("yes")
                                       || response.equalsIgnoreCase("y")) {
                                    System.out.println("You should make Steak, Baked Potato and Fruit");
                                 } else if (response.equalsIgnoreCase("no")
                                       || response.equalsIgnoreCase("n")) {
                                    System.out.println("You should make Steak and Potato Hash");
                                 } else {
                                    // If user's response is invalid.
                                    System.out.println("Invalid response.");
                                 }

                           } else {
                                 // If user's response is invalid.
                                 System.out.println("Invalid response.");
                           }

                        } else if (response.equalsIgnoreCase("no")
                                 || response.equalsIgnoreCase("n")) {
                           System.out.println("Do you have any Salad?");
                           response = scanner.nextLine();
                           // Checking if response is "yes", if user has Salad.
                           if (response.equalsIgnoreCase("yes")
                                    || response.equalsIgnoreCase("y")) {
                                 System.out.println("You should make Steak Salad");
                           } else if (response.equalsIgnoreCase("no")
                                    || response.equalsIgnoreCase("n")) {
                                 System.out.println("You should make Steak Sandwich");
                           } else {
                                 // If user's response is invalid.
                                 System.out.println("Invalid response.");
                           }
                        } else {
                           // If user's response is invalid.
                           System.out.println("Invalid response.");
                        }

                        break;
                     case "ground":

                        System.out.println("Do you have any Buns?");
                        response = scanner.nextLine();
                        // Checking if response is "yes", if user has Buns.
                        if (response.equalsIgnoreCase("yes")
                                 || response.equalsIgnoreCase("y")) {
                           System.out.println("You should make Hamburgers");
                        } else if (response.equalsIgnoreCase("no")
                                 || response.equalsIgnoreCase("n")) {

                           System.out.println("Do you have any Rice?");
                           response = scanner.nextLine();
                           // Checking if response is "yes", if user has Rice.
                           if (response.equalsIgnoreCase("yes")
                                    || response.equalsIgnoreCase("y")) {
                                 System.out.println("You should make Casserole");
                           } else if (response.equalsIgnoreCase("no")
                                    || response.equalsIgnoreCase("n")) {
                                 System.out.println("You should make Chili");
                           } else {
                                 // If user's response is invalid.
                                 System.out.println("Invalid response.");
                           }
                        } else {
                           // If user's response is invalid.
                           System.out.println("Invalid response.");
                        }

Go Fish Every kid plays Go Fish. But just in case you missed this...