Cook your pasta in a pot of heavily salted water, undercook it slightly so it can bubble away in the finished sauce for a minute or two. Before draining reserve a cup of the pasta water.
Melt 25g of the butter in a saucepan over a medium-high heat and toast the pepper for a minute.
Lower the heat slightly, add the rest of the butter and whisk until melted and just bubbling, careful not to brown.
Lower the heat even further, it should just be softly sizzling and add the garlic and cook for 30 more seconds.
Take the pan off the heat completely and add the lemon juice, a couple of teaspoons at a time, whisking until well combined (even though whisking in a lemony sauce is the polar opposite of relaxing, still a good workout?!).
Return to the element, still on a really low heat and add in ¼ cup of the pasta water and then your cooked pasta and toss well.
Let your pasta gently cook away in the butter mixture, turning and tossing constantly until al dente, 2-3 minutes.
Serve with the fresh lemon zest on top and lots of grated parmesan cheese.