1-Prepare equipment: Preheat oven to 350°F and line an 8×8 inch baking pan with parchment paper, leaving overhang.

2-Make the crust base: Process macadamia nuts into fine crumbs, then pulse with melted butter, sweetener, and salt until mixture resembles damp sand.

3-Bake the crust: Press mixture firmly into pan, bake 12-15 minutes until edges golden brown, then cool completely.

4-Blend the lemon filling: In a food processor or blender, combine eggs, lemon juice, zest, sweetener, and xanthan gum; process 30 seconds until smooth and bubbly.

5-Bake the bars: Pour filling over cooled crust, spread evenly, bake at 350°F for 20-25 minutes until edges set and center jiggles slightly.

6-Cool and chill: Cool at room temperature for 1 hour, then refrigerate at least 2 hours until firm.

7-Slice and serve: Cut into 16 squares with a hot, dry knife, wiping between cuts; serve chilled.