Ingredients
- 1 tablespoon olive oil
- 1 pound 80/20 ground beef
- Kosher salt and freshly ground black pepper
- One 24-ounce jar marinara sauce
- 2 tablespoons balsamic vinegar
- 1 tablespoon unsalted butter
- One 16-ounce tub whole-milk ricotta (about 2 cups)
- 1 cup grated Parmesan (about 4 ounces)
- 1 large egg, beaten
- 2 cups shredded mozzarella (about 8 ounces)
- 12 no-boil lasagna noodles
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