Preheat oven to 350 degrees.Spray a 12 cup muffin pan with nonstick cooking spray or line with paper liners.In a medium bowl add pancake mix, water, and vanilla. Mix together, but take care not to overmix because that'll make dense muffins. A few clumps are totally fine! Scoop batter into muffin cups (about ¾ of the way full). Gently press sausage peices evenly onto each muffin cup. Bake for about 15-18 minutes. Stick a knife in the center of a muffin and if it comes out clean, they're done!