Salisbury Meatballs With Alfredo Pasta

1 pound ground sirloin 1 large egg, lightly beaten 1 cup chopped yellow onion, divided 3/4 cup panko crumbs 1/4 cup ketchup 1 tables Dijon mustard 1 tables Worcestershire sauce 2 1/2 teas Montreal steak seasoning 3 tables olive oil, divided 1 (15 oz) jar Alfredo sauce 1 cup heavy whipping cream 1/2 (16 oz) … Continue reading