Zucchini, Black Bean and Corn Tostadas

olive oil

fresh white or yellow corn kernels

chopped red onion

garlic, finely chopped

medium tomatoes, roughly chopped

medium zucchini, diced

black beans, rinsed and drained

dried oregano

freshly ground black pepper

warm corn tortillas (This serves 4 people - 2 tostadas per person; make sure you get corn tortillas that have 70-80 calories and 2g fiber per tortilla)

Tomatillo (green) salsa (I like the kind from Trader Joe's)

Grated Monterey Jack Cheese or Mexican 4 cheese blend

Salt