Combine the first 7 ingredients in a food processor, and process until smooth.
Heat a large nonstick skillet over medium-high heat. Add 3/4 teaspoon oil to pan. Cook 1 tortilla 2 minutes on each side or until golden brown. Repeat procedure with 2 1/4 teaspoons oil and remaining tortillas.
Add remaining oil to pan. Add garlic and jalapeño; sauté 1 1/2 minutes. Add chicken; cook 2 minutes. Place 1 tortilla on each of 4 plates; top each tortilla with 1/2 cup chicken mixture, 1/4 cup lettuce, 2 tablespoons tomato, and 1 tablespoon cheese. Top each serving with 3 tablespoons dressing.
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