In a large bowl, combine the tomato, peppers, onion, black-eyed peas, beans, and corn. Set aside.
In a blender, purée the avocados, lemon juice, vinegar, oregano, and salt to make a creamy dressing.
Into each of 4 wide-mouth quart jars, spoon about 2 tablespoons of the dressing. Add about 1¼ cups “caviar” followed by 2 cups of leafy greens to each. Seal the lids tightly.