The great thing about this dish is that you can make both of them in under 20 minutes. The hard thing about this dish is that it really needs to be served immediately. Cream sauce doesn't do well if it has to wait and no one likes cold pasta.
Cook tortellini according to package directions. If you are using two different kinds, spinach and white, keep them separate unless you want them mixed.
In one large skillet, heat marinara sauce. In another large skillet, heat whipping cream. Heat until the red sauce is warm, and the cream is slightly thickened. When tortellini are cooked, use a slotted spoon to transfer half of the tortellini into each of the skillets.
Serve with parmesan cheese and freshly ground black pepper for the white tortellini.