Sour Cream and Onion Tuna Noodle Casserole

INGREDIENTS

stalks Celery

2 tbsp

Chives, Fresh

2 tbsp

Dill, Fresh

3 cloves

Garlic

1 1/2 cups

Peas, Frozen

Yellow onion, Large

1 tsp

Mustard, Dry

16 oz

Cavatappi noodles

1/3 cup

All-purpose flour

Kosher salt and freshly ground black pepper

2 cups

Sour cream and onion flavored potato chips

6 tbsp

Butter, Unsalted

4 oz

Gruyere cheese, Grated

3/4 cup

Half-and-half

1/4 cup

Parmesan, Grated

1/3 cup

Sour cream

2 cups

Whole milk

2 cans

size) albacore tuna, drained, broken into 1/2-inch chunks