Grilled Pork Tenderloin with Pipian Sauce

Name: Grilled Pork Tenderloin with Pipian Sauce
Ingredients: 1- to 1 1/4-pound pork tenderloin, cut into 1/2-inch-thick medallions; 3 tablespoons vegetable oil; 1/2 onion, coarsely chopped; 3/4 cup pumpkin seeds (pepitas); 1/4 cup peanuts (1 1/2 ounces); 1/4 cup sesame seeds (1 1/2 ounces); 2 garlic cloves, minced; 4 cups water; 12 ounces tomatillo,* husked; 2 teaspoons coarsely chopped seeded jalapeño chili; 1 1/2 cups fresh cilantro leaves; 1 1/2 cups torn romaine leaves; 1 1/4 cups low-salt chicken broth; 3 radishes, trimmed, chopped