Grilled Chile Salsa with Rice Crackers

Name: Grilled Chile Salsa with Rice Crackers
Yield: Makes About 2 cups
Ingredients: 6 large garlic cloves, unpeeled; 4 large plum tomatoes (3/4 to 1 pound total); 4 3-inch-long serrano chiles; 4 large shallots, peeled, halved through root end; 2 tablespoons vegetable oil; 1 cup chopped fresh cilantro; 8 teaspoons fresh lime juice; Purchased rice crackers