Place the soy curls in a container with hot water (just covering the curls) and the no-chicken base. Stir to dissolve the no-chicken base. Let the curls marinate for 15 minutes. RESERVE 2 T of the marinate to add to the sauce. Drain well in a strainer or colander.
Add the frozen spinach to a skillet with 1/4 cup water to cook for 5 minutes. Drain well.
While the spinach is cooking, in either a blender or a bowl (depending on how smooth you want the sauce), blend or whisk together the green enchilada sauce, the 2 T of reserved marinade, and the yogurt until smooth and creamy. Set aside.
Place the soy curls in a blender and on the LOWEST SPEED, turn it on for 3-5 seconds to shred them. Add them to a medium-sized bowl with the drained spinach.
Add seasonings to the spinach/soy curls mixture to taste. I used about 1/2 t of each (but not that much salt). Stir to combine.
Fill each tortilla with the filling and place in a 13x9 glass casserole dish.
Cover with the sauce, then cover with foil. Bake at 350 degrees for 30-45 minutes (depending on whether or not it was previously refrigerated) until bubbly and warm throughout. Serve!