Grandma's Beef and Noodle Casserole

Ingredients

• 1 (12 ounce) package egg noodles
• 1 pound ground beef
• 1 green bell pepper, chopped
• 1 large onion, chopped
• 3 tablespoons all-purpose flour
• 2 cups milk
• 1 pinch salt and ground black pepper to taste
• 1 ¼ cups grated Cheddar cheese, divided
• 1 (6 ounce) can chopped olives
• 1 (4 ounce) jar chopped pimento peppers