Stir together tomatoes, pasta, stock, 2 cups water, 1 teaspoon salt, and crushed red pepper in a large saucepan; bring to a boil over medium-high. Cook, stirring occasionally, until pasta is slightly softened, about 5 minutes.
Crush tomatoes in saucepan using the back of a spoon. Cook over medium-high, stirring occasionally, until pasta is al dente and liquid thickens and reduces slightly, about 6 minutes. (If needed, add additional water, 1 tablespoon at a time, until sauce reaches desired consistency.)
Stir in olives, black pepper, and remaining ½ teaspoon salt. Divide pasta mixture evenly among 4 bowls. Sprinkle with feta, mint, and oregano; drizzle with oil.
