Rice with cilantro

2 cups rice , medium or 2 cups long grain 2 large Tomatoes , quartered 1 medium white onion, quartered 2 medium serrano peppers (halved and seeded) or 2[...]

4 cups vegetable stock 1 each onion chopped 4 cloves garlic chopped 1 1/4 cups arborio rice 2 each carrots chopped 2 each celery stalks chopped 5 ounces[...]