- Bring a large pot of salted water to a boil. 
- Add the fettuccine and cook for 8-10 minutes until it's just shy of al dente. 
- Drain, reserving 1 cup of pasta water. 
- Heat olive oil in a large skillet over medium-high heat. 
- Add the cherry tomatoes and cook until they start to blister. 
- Add the crab meat to the skillet. 
- Stir gently for about 2 minutes until it's warmed through. 
- Toss the cooked pasta into the skillet with the tomato and crab mixture. 
- Add the butter, Parmesan cheese, and reserved pasta water. 
- Stir until the butter melts and forms a silky sauce. 
- Season with salt and pepper to taste. 
- Stir everything gently and serve hot.