[spring-webflux] best way to build a object

Food.java

public class Food {
    private String pizza;
    private String hamburger;

    public String getPizza() {
        return pizza;
    }
    
    public void setPizza(String pizza) {
        this.pizza = pizza;
    }
    
    public String getHamburger() {
        return hamburger;
    }
    
    public void setHamburger(String hamburger) {
        this.hamburger = hamburger;
    }
}

FoodBuilder.java

public class FoodBuilder {
    private String pizza;
    private String hamburger;

    public FoodBuilder() {
    }

    public FoodBuilder pizza(String pizza) {
        this.pizza = pizza;
        return this;
    }

    public FoodBuilder hamburger(String hamburger) {
        this.hamburger = hamburger;
        return this;
    }

    public Food build() {
        Food food = new Food();
        food.setPizza(pizza);
        food.setHamburger(hamburger);
        return food;
    }
}

OrderFood.java

import reactor.core.publisher.Mono;

public class OrderFood {

    private PizzaService pizzaService = new PizzaService();
    private HamburgerService hamburgerService = new HamburgerService();

    public Mono<Food> getOrder(int orderId) {
        return Mono.just(new FoodBuilder())
                .zipWith(pizzaService.getPizza(orderId), FoodBuilder::pizza)
                .zipWith(hamburgerService.getHamburger(orderId), FoodBuilder::hamburger)
                .map(FoodBuilder::build);
    }

    public class PizzaService {
        public Mono<String> getPizza(int orderId) {
            return Mono.just("pizza xx to order: " + orderId);
        }
    }

    public class HamburgerService {
        public Mono<String> getHamburger(int orderId) {
            return Mono.just("hamburger yy to order: " + orderId);
        }
    }
}