PREHEAT oven to 350°F. Line an 8x8-inch square pan with parchment paper.
HEAT olive oil in a skillet over medium heat. Add onions and a pinch of salt and cook until browned. Add garlic and stir for 30-60 seconds until fragrant, then remove from heat.
CUT about 15 thin slices of zucchini and shred the rest of the zucchini. Squeeze excess water out of the shredded zucchini.
DRAIN and rinse soaked mung beans, then add to a blender along with the water, olive oil, nutritional yeast, thyme, oregano, paprika, salt, and pepper. Blend until smooth.
IN a large mixing bowl, stir together the blended mixture, zucchini, onions, and garlic. Transfer to lined baking pan and bake for 40-45 minutes until the filling is set. You can test for doneness by sticking a toothpick in the center—it should come out clean.
COOL for at least 10 minutes before slicing, then serve as desired.