Avocado and tomato salad

This salad looks great heaped up on a large plate.  It's pretty and show-offy enough to be served to guests, even though it's really really easy!

Avocado and Tomato Salad

3 T red wine vinegar
3 T olive oil
1 t brown mustard
Dash of garlic powder

3 avocados, quartered and sliced
Pint of grape tomatoes, halved
3 - 4 radishes, sliced thin
1/2 c fresh basil, chopped
3 - 4 oz feta cheese, crumbled
Salt and pepper

Place vinegar through garlic powder in a small jar and shake.  Set aside.  Place the chopped avocados on a large plate and sprinkle with about 1/3 of the dressing.  Layer on the rest of the ingredients in order and top with the remaining dressing.