INGREDIENTS
1 cup
Onion
1
Egg, large
1/4 cup
Mayonnaise
1/2 tsp
Black pepper, freshly ground
1 tsp
Kosher salt
1 tbsp
Vegetable oil
1
sleeve Ritz crackers
1
1&2 cups cheddar cheese
2 tbsp
Butter, unsalted
1/2 cup
Parmesan cheese, grated
8 oz
Sour cream
2 & 1/2 lbs yellow squashed (sliced)