Since a concrete strategy is very often determined at run time based on the provided parameters or so, I would suggest something as follows.
@Component
public class BurgerStrategy implements MealStrategy { ... }
@Component
public class SausageStrategy implements MealStrategy { ... }
Then inject all such strategies into a map (with bean name as a key) in the given controller and select respective strategy on request.
@Autowired
Map<String, MealStrategy> mealStrategies = new HashMap<>;
@RequestMapping(method=RequestMethod.POST)
public @ResponseBody Something makeMeal(@RequestParam(value="mealStrategyId") String mealStrategyId, Meat meat) {
mealStrategies.get(mealStrategyId).cook(meat);
...
}