Make Poblano crema - in small skillet heat olive oil, sauté poblano peppers and garlic for 2 minutes.
Pull off of heat and season with cumin and a little salt, add 1 tsp. of the lime juice. When cooled whisk in the sour cream and yogurt and chill.
Heat chicken per specifications.
Toss the avocado with the other 1 tsp. of lime juice.
To build the sandwich, place the heated chicken breast on one slice of the French bread, top with tomato slices, avocado and sliced jalapeno. Drizzle with the chilled poblano crema.
Top with other slice of French bread and press to heat.