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 eggs until a shaggy dough forms. Knead vigorously for 8 to 10 minutes until smooth and elastic. Wrap dough in plastic 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 bowl. Stir thoroughly until all ingredients are evenly distributed and mixture is well blended.
03 - Divide rested dough into two equal portions. Working with one portion at a time, roll dough into thin sheets approximately 1/16 inch thick using a pasta machine or rolling pin. Keep remaining dough covered to prevent drying.
04 - Cut rolled dough into 2-inch squares or rounds. Place 1 teaspoon of cheese filling in the center of each piece. Fold dough over to create a triangle or half-moon shape, firmly pressing edges to seal. Bring the two corners together and pinch to form the classic tortellini shape.
05 - Bring a large pot of generously salted water to a rolling boil. Gently drop tortellini into boiling water and cook for 3 to 4 minutes until they float to the surface. Remove carefully with a slotted spoon and transfer to a serving bowl.
06 - Heat olive oil in a saucepan over medium heat. Add minced garlic and sauté for about 1 minute until fragrant. Pour in crushed tomatoes and add sugar, salt, dried oregano, and black pepper. Reduce heat to low and simmer for 10 minutes, stirring occasionally.
07 - Gently toss cooked tortellini with warm tomato sauce until evenly coated. Transfer to serving plates and garnish with fresh basil leaves. Sprinkle additional grated Parmesan over the top if desired.