Tuna Noodle Casserole Supreme

1 1/2 c. sour cream
1/2 c. mayo.
1/4 c. Parm. cheese
1 teas. dijon mustard
1/4 teas. onion powder
1/4 teas. pepper
4 c. cooked mini shell pasta
2 c. thawed frozen peas
2 cans drained and rinsed tuna
1/2 c. chopped red pepper

Crumb topping:
Crush sleeve of ritz crackers or 1 c. crushed wheat checks.
Coat with 2 Tbsp. melted butter.

Combine all ingredients in 13 x 9 baking dish. Sprinkle topping on top of mixture.

Bake covered 35 minutes. Bake uncovered 10 more minutes.