Combine the water, yeast and sugar in a bowl. Rest for 5 minutes.
1. Prepare the Mixture: In a large bowl, gently break up the drained lump crab meat with a fork. Add the keto cracker crumbs, chopped parsley, sliced green onion, Old Bay seasoning, salt, and pepper. Gently mix until just combined.
2. Bind the Cakes: Stir in the egg, mayonnaise, and Dijon mustard until the mixture is lightly moistened. Be careful not to overmix.
3. Form & Chill: Use your hands to form the mixture into 4 uniform patties, each about 3/4 to 1 inch thick. Place them on a plate lined with waxed paper and refrigerate for at least 30 minutes to help them firm up and hold their shape.
4. Air Fryer Method: Lightly spray or brush your air fryer rack or basket with oil. Brush both sides of the chilled crab cakes with melted butter. Place them on the rack and air fry at 350°F (175°C) for 10 minutes, carefully flipping halfway through, until they are beautifully golden and cooked through.
5. Stovetop Method (Alternate): If using a skillet, melt the butter over medium heat. Once hot, carefully place the chilled crab cakes in the pan and cook for 3 to 4 minutes per side, until they achieve a lovely golden-brown crust and are heated through.
6. Serve with Spicy Mayo (Optional): In a small bowl, whisk together the mayonnaise, sriracha, and Cajun seasoning for an extra flavor boost. Serve your delicious crab cakes immediately with a lemon wedge and a dollop of the spicy mayo.