Breakfast Casserole with Biscuits and Gravy

Ingredients (6)

• + 1 (2.64 ounce) package sausage-flavored gravy mix (such as McCormick®) add to pantry
• + 2 cups cold water add to pantry
• + 1 pound sausage add to pantry
• ✓ 6 large eggs, beaten
• + 1 (16.3 ounce) can buttermilk biscuit dough, separated add to pantry
• + 1 (16 ounce) package shredded Cheddar cheese add to pantry