savoury potato and sausage tart "aka: easy bake dinner"

1 tbs butter, melted, plus more for pan
4 cups shredded hash brown potatoes, thawed
½ small onion, small dice
1/3 med red pepper, diced
½ cup diced kielbasa sausage
1 ½ cups shredded cheddar cheese
9 large eggs
¾ tsp kosher salt
½ tsp fresh ground pepper

Heat oven to 375F. Butter the insides of a 7-inch spring form pan. Line the bottom and sides with parchment paper.

Squeeze any excess moisture from hash browns. In a large bowl, combine hash browns with butter, onion, red pepper, sausage,1 cup of the cheddar, salt and pepper. Whisk eggs and add to hash brown mixture; fold to combine. Transfer to prepared pan, top with remaining cheese and bake 45 to 50 minutes or until, when pan is shaken, the middle jiggles but the sides are set. Remove from oven and let set a few minutes before unmoulding.