This is perhaps a bit more of a philosophical point but I think that I find the separation of quantity and ingredient perhaps a little arbitrary - in many cases they're coupled tightly e.g. I've only ever found 'cloves' as a quantity to refer to garlic.
I've personally always wanted recipes to be prefixed with a mise en place section of steps - e.g. instruct the reader explicitly to dice onions, etc. in the main body of the recipe rather than imply the step in the ingredient description - what do you reckon?
UX feedback: Make the sample recipe graphs larger, especially at "tablet" size. Tablets are often used in the kitchen, and laptop screens are sometimes set to half-width for multitasking. Consider stacking the sidebar at a larger breakpoint.
Minor note: The border-radius on cards causes a small gap at the top-right for cards with simultaneous instructions.
Also, my recipe didn’t save after I entered my email and used the link. Great work overall!
A possible improvement would be to replace freedom units with their international counterpart (with sane rounding to a two digits precision, or similar).