
Step 1 · Cook the Onions
In a 12-inch skillet over medium heat, heat the oil until shimmering. Add the onion and 1/4 teaspoon salt. Cook, stirring occasionally, until softened and translucent, 5 to 7 minutes.
Step 2 · Add Garlic and Tomato Paste
Add the garlic, tomato paste, and pepper flakes. Cook, stirring, until the tomato paste darkens slightly and begins to stick to the pan, about 2 minutes.
Step 3 · Simmer the Sauce
Stir in the crushed tomatoes, 1/2 cup water, 1/2 teaspoon salt, and 1/4 teaspoon black pepper. Bring to a simmer, reduce the heat to medium-low, and cook, stirring occasionally, until slightly thickened, 7 to 10 minutes.
Step 4 · Add Beans and Season
Add the beans and bring to a simmer over medium heat, stirring occasionally. Remove from the heat and stir in 4 tablespoons dill, or 2 tablespoons marjoram. Taste and season with salt and black pepper.
Step 5 · Finish and Serve
Transfer to a serving dish. Sprinkle with the feta and remaining dill or marjoram, then drizzle with additional oil.