Heat 1 tablespoon olive oil in a large oven-safe skillet over medium-high heat until shimmering. Add 2 cloves minced garlic and cook, stirring, about 2 minutes until fragrant (avoid letting the garlic brown).

Pour in the entire (25.25 oz) jar DeLallo marinara sauce. Add 16 oz DeLallo gnocchi straight from the package, separating any pieces that are stuck together. Stir to combine and season with salt and black pepper to taste. Bring to a gentle simmer.

Reduce heat to medium and simmer, stirring occasionally, until the gnocchi are soft and cooked through, about 5 to 6 minutes.

Arrange 8 oz fresh mozzarella cheese slices evenly over the gnocchi. Preheat the oven broiler. When the broiler is hot, place the skillet under the broiler and heat until the cheese melts and is bubbly, about 2 to 3 minutes — watch closely to avoid burning.

Remove the skillet from the oven. Garnish with 1/3 cup chopped basil, if using, and serve immediately.