Vegetable Sandwich with Lemon-Shallot Herb Sauce

Combine oil, shallot, garlic, cilantro, dill, parsley, oregano, lemon zest, lemon juice and 1/2 teaspoon salt in a blender; blend until smooth. 

Preheat panini maker to high. Coat the panini maker with cooking spray. Spread 2 tablespoons of the sauce on each slice of bread (reserve remaining sauce for another use). Top each slice with cheese. Stack with vegetables and sprinkle with cumin and the remaining pinch of salt and pepper. Close the sandwich and cook in the panini maker until golden brown and crispy, about 5 minutes.