Bring the water, vinegar and sugar to a boil. Place the onions in a heat-resistant glass bowl. Pour the vinegar over the onion and let rest for 30 minutes. Remove the onion and let cool on the counter.
STEP 2
Grill the bologna on high heat for 1 - 2 minutes per side, or until hot.
STEP 3
Dice the avocado and bologna.
STEP 4
Warm tortillas on the grill or microwave.
STEP 5
Add diced bologna to the tacos and follow with the onions and avocado. Add salt to taste.
