PreparationMake tomato sauce: Cook garlic and red pepper flakes in oil in a 2-quarts heavy saucepan over medium heat, stirring, until garlic is golden, about 30 seconds. Add tomatoes, water, sugar, and 1/2 teaspoon salt and simmer, uncovered, stirring occasionally, until thickened, 25 to 30 minutes. Prepare squash blossoms: Stir together ricotta, yolk, mint, 1/3 cup parmesan, and 1/8 teaspoon each of salt and pepper. Carefully open each blossom and fill with about 2 rounded teaspoon ricotta filling, gently twisting end of blossom to enclose filling. (You may have filling left over.) Whisk together flour, remaining 1/3 cup parmesan, 1/4 teaspoon salt, and seltzer in a small bowl. Heat 1/2 inch oil to 375°F in a 10-inch heavy skillet. Meanwhile, dip half of blossoms in batter to thinly coat. Fry coated blossoms, turning once, until golden, 1 to 2 minutes total. Transfer with tongs to paper towels to drain. Coat and fry remaining blossoms. (Return oil to 375°F between batches.) Season with salt. Serve with tomato sauce. Cooks' NoteTomato sauce and ricotta filling can be made 1 day ahead and chilled. Reheat sauce before serving.
PreparationMake tomato sauce: Cook garlic and red pepper flakes in oil in a 2-quarts heavy saucepan over medium heat, stirring, until garlic is golden, about 30 seconds. Add tomatoes, water, sugar, and 1/2 teaspoon salt and simmer, uncovered, stirring occasionally, until thickened, 25 to 30 minutes. Prepare squash blossoms: Stir together ricotta, yolk, mint, 1/3 cup parmesan, and 1/8 teaspoon each of salt and pepper. Carefully open each blossom and fill with about 2 rounded teaspoon ricotta filling, gently twisting end of blossom to enclose filling. (You may have filling left over.) Whisk together flour, remaining 1/3 cup parmesan, 1/4 teaspoon salt, and seltzer in a small bowl. Heat 1/2 inch oil to 375°F in a 10-inch heavy skillet. Meanwhile, dip half of blossoms in batter to thinly coat. Fry coated blossoms, turning once, until golden, 1 to 2 minutes total. Transfer with tongs to paper towels to drain. Coat and fry remaining blossoms. (Return oil to 375°F between batches.) Season with salt. Serve with tomato sauce. Cooks' NoteTomato sauce and ricotta filling can be made 1 day ahead and chilled. Reheat sauce before serving.