Mix flour and water in a small bowl. Set aside. Heat 3 Tbsp. oil on medium in a skillet. Add onions, cook until tender. Add garlic, cook for 2 min. Add ground beef, cumin, coriander, Italian seasoning, pepper flakes, salt, pepper, jalapeno, cilantro and green onion. Cook thoroughly. Remove from heat and strain out the grease.
Take pita bread and cut in half. Spread some of the flour paste on the cut side of the pita bread folding it and making a pocket. Stuff the pita bread with the beef mixture and fold again sealing it with the paste forming a triangle. Complete until beef mixture is gone.
Heat remaining oil in a pot on med-high. Fry samboosas until the pita bread is golden brown (30-45 seconds). Let cool and enjoy.