01 - Mound flour on a clean work surface and create a deep well in the center. Crack eggs into the well and add salt. Using a fork, gradually incorporate flour into the eggs until a shaggy dough forms. Knead the dough vigorously for 8 to 10 minutes until smooth and elastic. Wrap tightly in plastic wrap and let rest at room temperature for 20 minutes.
02 - Combine shredded mozzarella, ricotta, grated Parmesan, black pepper, salt, and chopped basil in a medium mixing bowl. Stir thoroughly until all ingredients are evenly distributed and mixture forms a cohesive filling. Cover and refrigerate until ready to use.
03 - Divide the rested dough into two equal portions. Working with one portion at a time, roll the dough into thin sheets approximately 1/16 inch thick using a pasta machine or rolling pin. Keep the remaining dough covered to prevent drying.
04 - Cut the rolled dough into 2-inch squares or rounds. Place 1 teaspoon of cheese filling in the center of each piece. Fold the dough over to form a triangle or half-moon shape, pressing firmly to seal edges. Bring the two corners together and pinch to create the classic tortellini shape.
05 - Bring a large pot of salted water to a rolling boil. Gently drop the tortellini into the boiling water and cook for 3 to 4 minutes until they float to the surface. Remove carefully using a slotted spoon and transfer to a serving bowl.
06 - Heat olive oil in a saucepan over medium heat. Add minced garlic and sauté until fragrant, approximately 1 minute. Pour in crushed tomatoes and add sugar, salt, dried oregano, and black pepper. Reduce heat to low and simmer for 10 minutes, stirring occasionally to prevent sticking.
07 - Gently toss the cooked tortellini with the warm tomato sauce until evenly coated. Transfer to serving plates and garnish with fresh basil leaves. Additional grated Parmesan may be sprinkled on top if desired.