Chop, medium coarse, onion. Slice the chili pepper (jalapeno and serrano) and red bell pepper length wise and remove the seeds. Then finely chop the jalapeno & serrano pepper and coarsely chop the red bell pepper.
In a large skillet on the stove, at medium-high heat, add olive oil and chopped onion and peppers. Sauté until onion is almost brown and translucent.Alternative to use instapot at saute heat Crush garlic cloves, remove skins, and finely chop. Add to skillet and cook for 1-2 minutes.
Coarsely chop washed cauliflower and broccoli. Add to skillet with salt. Cook for about 5 minutes until crispy tender. Turn off heat and let cool in the pan.
Chop parsley, mint, cucumber, tomato, and green onions. Add to a large mixing bowl.
Zest and juice the lemons. Add zest and juice to the mixing bowl.
In the large bowl, combine remaining olive oil, salt, and olives. Mix well with a large spoon.
Cover bowl and let sit for at least 1 hour to allow flavors to meld.