Prep the rind.Wash the watermelon rind thoroughly (best before you cut open the watermelon). Chop it small – think tiny dice – so it softens quickly. A vegetable dicer comes in handy for this step.
Simmer.Place the chopped rind in a pot, cover with vegetable broth, and let it simmer for 20–30 minutes until soft (the rind will turn translucent, see images above).Drain well (but save that broth! It’s perfect for soups – or freeze it for later).
Blend it up.Let the rind cool a bit, then toss it in a food processor with the olive oil, garlic, nutritional yeast, almond butter, salt, and pepper.Blend until smooth, but still have a bit of a bite.
Add thickener.Check the consistency. If it’s too runny for your taste—or for how you plan to use the spread—add 1 tablespoon of psyllium husk and let it sit for 10–15 minutes to thicken. If it’s still not thick enough, add another tablespoon and wait again.