Weight loss meals are actually generally not very tasty because they are generally less oil, less salt, less spice, and pretty much just the original flavor of the ingredients, which is a little hard to tolerate for people who are used to eating good food.
But it's okay if you're used to eating it.
Common diet meals:
Morning: eggs, milk, yogurt
Lunch: broccoli, vegetable salad
Dinner: fruits, yogurt, corn