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As far as quality? Thomas Delauer and Sten Eckberg are two excellent sources (especially the latter one, as he has a more educational approach). Another one, Flavor City, has some keto recipes.

As far as "as much": don't forget that total calories still matter. But yes, if you're a "hard gainer", then you likely don,t eat enough for what you spend

it's 5:10 am and I'm hungry

:D