Crescent Breakfast Squares

Name: Crescent Breakfast Squares
Ingredients: Cooking spray; 12 large eggs; 1/4 c. milk; 3 tbsp. butter, divided; Kosher salt; Freshly ground black pepper; 2 cans crescent dough; 1/2 lb. deli ham, sliced; 1/4 c. finely chopped chives; 12 slices cheddar; 1 tsp. poppy seeds; 1 tsp. sesame seeds; 1 tsp. minced onion; 1 tsp. dried garlic; Flaky sea salt