Let the Crab meat thaw overnight in the fridge or at room temperature for 6 hours.
Cook spaghetti noodles according to package directions. Drain and reserve 1 cup of cooking water.
In a large pan over medium high heat melt butter in olive oil. Add garlic and cook for 30 seconds, stirring constantly, until fragrant. Add white wine, lemon juice and red pepper flakes. Bring to boil and reduce to simmer and cook for 8 minutes. Add the crab meat and hot spaghetti and stir to mix well. Add ½ cup of Parmesan and kosher salt; toss. Add ¼ cup of reserved cooking liquid at a time if the pasta needs more liquid. Top with Lemon and Garlic Gremolata and more Parmesan cheese and serve.
For lemon and garlic gremolata
In a medium fry pan, melt butter over medium high heat. Add breadcrumbs and kosher salt. Stir to combine in butter. Toast bread crumbs for about 3-5 minutes, stirring occasionally. Be careful so crumbs don’t burn. Remove hot bread crumbs from heat and add in garlic, parsley and lemon zest. Stir to combine and add to top of Crab Spaghetti.