In a large pot, boil water and cook tortellini according to package directions.
In a large saute or frying pan, heat the oil over medium-low heat.
Add the garlic. Stir occasionally.
After about 2-4 minutes, when the garlic has slightly softened but hasn't yet turned color, turn the heat up to medium-high.
Gently add the sage leaves.
Stir the sage and garlic gently and saute until the sage leaves are just slightly crisp, which can happen quickly at medium-high heat (anywhere from 1-3 minutes), so be sure to watch the sage carefully.
Stir in ground sage, salt and pepper.
Gently add cooked pasta and mix all ingredients together immediately, stirring until all tortellini pieces are well blended.