1: Preheat the oven to 425°.
2: Open up the sub buns and sprinkle a little mozzarella cheese onto the bottom bun.
3: Top with 3-4 halved meatballs and spoon a little marinara over.
4: Finish with more mozzarella cheese.
5: BAKE without the top bun for 15-20 minutes until the subs are bubbly + hot.
6: Brush the top bun with melted butter + sprinkle with a little oregano.
7: Place the top bun onto the subs to finish baking in the last 3 minutes of cooking.
8: ENJOY! Optionally, top with microgreens or arugula.
