Cut watermelon into 1-inch-thick slices and cut off rind
Either use large baking dish or reusable bag and pour in all of your ingredients in except the watermelon and mix well
Add your watermelon slices and coat each slice, no need to marinate it so if your dish isn't big enough you can do it in batches
Put watermelon in single layer on a baking sheet and pour marinade over watermelon, bake for 40 mins checking around the 30-minute mark to make sure nothing is burning, as oven heat temps vary.
Notes
You can puncture with a fork to see if it’s done; you are looking for a soft fishy texture. The watermelon texture completely changes when cooking!You can eat hot or cold, I like to cube it and stick in the fridge with any leftover marinade for easy “sushi” bowls