Preheat oven to 350 F or 180 C.
Cut the ends off of the zucchini and using a vegetable peeler, slice the zucchini longways. Discard the thin, end pieces. Make sure the slices are very thin. I like to place paper towels between each lawyer of the zucchini so it can absorb excess water.
In a mixing bowl, combine the ricotta cheese, basil, garlic, oregano and egg. Mix well with a fork.
Transfer the zucchini to a cutting board and layer two overlapped strips vertically and two horizontally to make a cross. Repeat with remaining slices.
Using an ice-cream scoop, scoop out the ricotta mixture (about 1 tablespoon) and place in the middle of each zucchini cross.
Fold each side to seal the ricotta mixture and flip over the ravioli so the seam side is on the bottom.
In a baking dish, add a few table spoons of tomato sauce and smooth out. Place the ravioli over the tomato sauce and top each ravioli with a tablespoon of the remaining sauce. Sprinkle with cheese and chili flakes.
Bake for 20 minutes, until the cheese melts.