Smoked Sausage & Potato Chowder

1 lb smoked sausage (I always use Eckrich Skinless Smoked Sausage) 1 cup chopped onion 1 teaspoon oil 1 (14 1/2 ounce) can del monte diced tomatoes[...]

1 (30 ounce) bag frozen hash browns , thawed and squeezed dry 1/4 cup butter , melted 4 large eggs , lightly beaten 1 cup half-and-half 1 teaspoon dry mustard[...]

1 lb fully-cooked smoked sausage , thinly sliced 1 (14 1/2 ounce) can beef broth 1 cup water 1 (5 ounce) package scalloped potatoes mix , with cheese 2 cups[...]