In a large bowl, combine mix with water and oil. Form dough into a ball.
Lightly oil 1⁄4 Sheet Pan with olive oil. Using lightly oiled hands or a spatula, gently press dough into pan, filling right to the corners. Bake for 15 min.
Meanwhile, prepare dip. In a bowl stir together yogurt and dip mix.
Dice cucumber, peppers, and avocado into small pieces.
To assemble, spread dip over cooled pizza shell. Arrange veggies on top .