- 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.