Confetti Chicken Spaghetti Casserole | Just A Pinch

Ingredients

• 2 pound(s) cooked and diced chicken breasts
• 4 stalk(s) celery, chopped
• 1 medium green pepper, chopped
• 3/4 cup(s) chopped onion
• 2 can(s) original Rotel tomatoes (10 oz each)
• 1/2 stick(s) butter
• 1 can(s) English peas, drained (8.5 oz)
• 1 can(s) chopped black olives (2.25 oz)
• 1 can(s) chopped water chestnuts (5 oz)
• 16 oz package(s) vermicelli, cooked
• 1 1/2 pound(s) Velveeta cheese
• 16 ounce(s) shredded cheddar cheese