chicken tetrazzini casserole

Ingredients

• 12 ounces spaghetti
• 1 1/2 teaspoons vegetable oil
• 1/2 teaspoon salt
• 1 1/2 teaspoons butter
• 1/4 cup chopped onion
• 1 can clove garlic
• 1 can cream of mushroom 10 oz.
• 1 can cream of chicken 10 oz
• 1 cup chicken broth (no salt)
• 1 teaspoon seasoned salt
• 3 cups shredded american cheese
• 4 cups shredded chicken or 2 cans drained
• 2 tablespoons chopped parsley
• 2 tablespoons diced red bell pepper (optional)