Avocado, Black Bean, Grilled Corn and Roasted Tomato Salad

You need:
1 avocado, cubed
1/2 can black beans, rinsed
1/2 cup roasted tomatoes, chopped
1 ear corn, grilled and cut
1 small squeeze lemon juice (to reduce browning on avocado)
salt, pepper, and chili powder (I probably used 1-2 teaspoons, because I didn't make a lot

Mix everything together gently