Be sure to use nice sweet berries for this. Tart ones will sound a dissonant flavor note.
1 14-inch pizza crust
3-4 oz. shredded mozzarella
1 cup sliced leeks (about 2 fat ones)
1 cup chopped fresh basil
1 cup blackberries (cut in half if very large)
1-2 oz. goat cheese (optional)
Salt and pepper
Preheat the oven to 450 degrees. Heat a little olive oil in a small skillet and saute the leeks for 2-3 minutes. Remove from heat.
Paint the pizza crust lightly with olive oil, then spread the mozzarella over it. Top with the sauteed leeks, then sprinkle with basil. Top the pizza with the blackberries, then with the goat cheese (if using). Sprinkle with salt and pepper.
Bake the pizza for 15-18 minutes, until the crust is done, the berries are juicy, and the cheese begins to brown.