Add the garlic and onions to a food processor and process until thoroughly combined.
Add the soy sauce, red wine, sesame oil, black pepper, pears, pineapple cubes and 1 1/2 cups water and process until thoroughly combined.
Add the rib eye to a bowl, pour over the bulgogi marinade and allow the beef to marinate for at least 10 minutes.
Heat a large saute pan over medium-high heat until hot.
Remove the beef from the marinade, letting any excess marinade drip back into the bowl.
Add the beef to the pan and cook until well done, about 5 minutes. (This is very important to allow the flavors of the marinade to develop completely.)
Peel the pear and slice it into thin half-moons.
Place a layer of the kimchee and then the beef into each taco shell. Garnish with the scallion slaw and sliced pears.