Easy Homemade Green Bean Casserole

Ingredients:
- 500 grams of fresh green beans.
- 1 and 1/3 cups of French fried onions.
- 1 cup of grated cheddar cheese.
- 1 and 1/2 cups of cream of mushroom soup.
- 1/4 tsp of freshly ground black pepper.
- A pinch of salt.