Preheat oven to 400°F.
Use a paper towel to grease the baking dish with the softened butter.
1 tbsp unsalted butter
In a large skillet, heat the oil over medium heat. Sauté the onion until just starting to soften, about 4 minutes. Add the garlic and sauté another 30 seconds. Crumble the sausage into the skillet and cook it, stirring often with a wooden spoon, until fully cooked and no longer pink. Drain excess grease, if necessary.
2 tbsp olive oil, 1 onion, 4 garlic cloves, 1 lb hot Italian sausage
Stir in wine, oregano, salt and paprika. Bring to a boil and cook until liquid is almost evaporated.
½ cup dry white wine, ½ tsp dried oregano, ½ tsp Kosher salt, ½ tsp smoked paprika
Add cream cheese and stir until melted.
8 oz cream cheese
Stir in spinach, beans and tomatoes and cook, stirring often, until spinach is wilted.
4 oz fresh spinach, 1 15 oz can white beans, 1 cup sun-dried tomatoes
Transfer to a greased 8-inch square (or 1 1/2 quart) baking dish.
Sprinkle with the two cheeses.
1 cup mozzarella cheese, ½ cup Parmesan cheese
Bake until bubbly, and lightly golden on top, 15 to 20 minutes.
Serve with toasted crostinis and/or crackers.
Toasted crostinis or crackers