Cook Pasta in a big pot of salted water until ‘al dente’. Reserve 1 cup of pasta cooking water. Drain pasta and return to the pot.
While pasta is cooking, heat 3tbsp olive oil and garlic in a large skillet. Add crushed red pepper flakes, if using. Cook over medium heat until garlic starts to sizzle and turn lightly golden, about 3~4 minutes.
Add kale and cook till it slightly wilts, about 2~3 minutes. Add steamed broccoli and cook for 1 more minute to heat through.
Next transfer the pasta to the skillet along with ½cup of pasta cooking water, increase the heat to high and cook tossing the noodles constantly, until a creamy sauce forms and coats the noodles. Add more pasta water if needed.
Remove from heat and stir in the remaining 1tbsp olive oil and mix well. Top with grated parmesan, if desired. Serve right away!!