Cook noodles until partly done.

Preheat oven to 350°F (175°C).

Grease a casserole dish.

Place partly done noodles in the greased casserole dish.

Heat cooking oil in a skillet over medium heat.

Add chopped onion and green pepper to the skillet and sauté until softened.

Add ground meat to the skillet and brown.

Drain any excess grease from the skillet.

Add garlic, mushrooms, olives, tomato sauce, salt, pepper, chili powder, and water to the skillet.

Stir to combine all ingredients.

Pour the meat and vegetable mixture over the noodles in the casserole dish.

Sprinkle grated cheese over the top.

Bake in the preheated oven for about 30 minutes, or until the cheese is melted and bubbly and the casserole is heated through.

Let stand for 10 minutes before serving.