1 pound beets, peeled and diced into ½-inch cubes
1 cup firmly packed fresh parsley leaves, trimmed off on thick stems
2 tablespoons fresh oregano leaves
4 large garlic cloves
½ teaspoon salt
1/8 teaspoon black pepper
¼ teaspoon red pepper flakes
2 tablespoons red wine vinegar
1/3 cup olive oil