In a bowl, marinade the chicken with the Marinade for at least an hour in the refrigerator.
Line a layer of aluminum foil in a baking pan for grilling. Spread the marinated chicken in a single layer on the pan, discard the remaining marinade. Grill the chicken at 450°F (232°C) for 6-7 minutes, turning at half time.
While the chicken is cooking, prepare the Tomato Sauce and Spice Mix in separate bowls. Remove the chicken from the pan when it is done and discard the juice.
Heat a small sauce pan and melt the butter. Sauté the garlic and jalapeno until aromatic. Pour in the Spice Mix and sauté until fragrant, about 1-2 minutes on medium heat. Remove the jalapeno and discard.
Add in the Tomato Sauce and stir well to mix. Sprinkle salt to taste and continue to simmer until the sauce thickens, another 2 minutes. Turn off the heat and add the chicken meat into the sauce and mix well.
Pre-heat the oven to 450°F (232°C). Place the pizza crust on a pizza pan and brush lightly with olive oil. Spread the sauce/gravy on the pizza crust. Sprinkle 1/2 cup of cheese. Arrange the chicken on the pizza. Top it with the sliced onions, chopped cilantro and the remaining cheese.
Reduce the temperature to 425°F (218°C). Bake the pizza for 8-10 minutes. Remove the pizza from the pan when it is done and garnish the remaining chopped cilantro.