Soak green mung beans overnight or minimum 6 hours in at least 4 cups cold water until beans have softened and swelled significantly — do not skip or shorten soaking time.
Drain and rinse soaked beans thoroughly before blending.
Place drained soaked mung beans in blender or food processor and blend until a thick coarse paste forms — mostly smooth with some texture remaining — do not add water unless absolutely necessary to get blender moving.
Transfer blended mung bean paste to a large mixing bowl.
Add finely chopped onion, grated ginger, chopped green chilies, thawed green peas, roughly chopped fresh spinach, grated paneer, roasted chickpea flour, ground cumin, chaat masala, sesame seeds, ground coriander, and salt.
Mix everything thoroughly until completely combined into a uniform well-seasoned mixture that holds together firmly when pressed — if mixture feels too wet add one additional tablespoon roasted chickpea flour and mix again.
Divide mixture into equal portions and shape each into a round flat patty approximately ¾ inch thick.
Heat a thin layer of neutral oil in a non-stick skillet or cast iron pan over medium heat until hot and shimmering.
Add patties in a single layer — do not overcrowd pan — and cook for 3–4 minutes per side until deeply golden brown and crispy on exterior and cooked through.
Do not flip patties until they release naturally from the pan — forced early flipping breaks patties apart.
Remove cooked patties and drain on a wire rack or paper towel-lined plate.
While patties cook make the dipping sauce — add roasted red bell pepper half, fresh cilantro, paneer cubes, soaked and drained dried red chilies, peeled garlic cloves, plain yogurt, salt, and dried oregano to a blender.
Blend on high speed until completely smooth and creamy — sauce should be vibrant in color thick enough to coat a spoon and deeply flavored.
Taste dipping sauce and adjust seasoning then transfer to a small serving bowl.
Assemble fresh salad — combine thinly sliced red onion, sliced or diced tomato, sliced or diced cucumber, and roughly torn fresh lettuce in a large bowl.
Squeeze fresh lemon juice generously over salad add salt and a pinch of dried oregano and toss well — dress just before serving to keep vegetables crisp.
Build each bowl — arrange a generous portion of fresh salad in the base of each serving bowl.
Place 2–3 hot crispy patties on top of or alongside the salad.
Add a generous spoonful of roasted red pepper and paneer dipping sauce on the side or drizzled directly over the patties.
Serve immediately while patties are hot and crispy.