Uncover and baste with some BBQ sauce and continue roasting another hour or so, uncovered, basting occasionally. Depends on how tender you want the ribs, but I parboil for 45 min. - 1hr. then I put bbq sauce on them and bake at 350 for 45 min. I baste the ribs every 15 min. with sauce. Source(s): I cook every day for my family and they love ribs.
https://answers.yahoo.com/question/index?qid=20080819150449AAd3gCd
1 Make one recipe of Rib Sauce (above) and set aside. 2  Pre-cook ribs by EITHER Baking (preferred method) OR Parboiling.  MAKE-AHEAD TIP: After pre-cooking (baking or parboiling) ribs, they may be vacuum sealed and frozen for up to 3 months OR glazed with Rib Sauce and refrigerated or given their final baking immediately.
http://www.food.com/recipe/best-baby-back-ribs-in-town-57185
Brush evenly over both sides of the ribs. Preheat grill on high for 5 minutes, then reduce heat to medium. Combine barbecue sauce and honey and brush over ribs. Place ribs on the grill and cook about 10 minutes per side, to heat through. Pass remaining barbecue sauce at the table.
http://www.vikingrange.com/consumer/lifestyle/recipe.jsp?id=prod630124
1 Repeat with second half of ribs, using another 1/3 of sauce or enough of the remaining sauce to glaze all the ribs. 2  MAKE-AHEAD TIP: At this point you can cover them with plastic wrap and refrigerate for up to 48 hours.  If frozen, thaw before baking.
http://www.food.com/recipe/best-baby-back-ribs-in-town-57185
In translation, I usually let my husband handle this chore. The exception to this rule is cooking up baby back ribs. That’s when I become the queen of our Viking Outdoor Chargrill. I began toying with rib recipes about 15 years ago, when a friend from Chicago related his recipe for parboiled baby back ribs. Parboiling took the mystery of tenderness out of the rib equation, so my next task was to add flavor to the ribs.
http://www.vikingrange.com/consumer/lifestyle/recipe.jsp?id=prod630124
1 Place spareribs in a large stock pot with barbeque sauce, onion, salt, and pepper. Pour in enough water to cover. Bring to a low boil, and cook approximately 40 minutes.  Preheat grill for high heat.
http://allrecipes.com/recipe/25432/simple-country-ribs/
1 Pour about 1/3 of Rib Sauce over one dish of ribs to glaze them. 2  Repeat with second half of ribs, using another 1/3 of sauce or enough of the remaining sauce to glaze all the ribs. 3  MAKE-AHEAD TIP: At this point you can cover them with plastic wrap and refrigerate for up to 48 hours.  If frozen, thaw before baking.
http://www.food.com/recipe/best-baby-back-ribs-in-town-57185
1 Repeat with second half of ribs, using another 1/3 of sauce or enough of the remaining sauce to glaze all the ribs. 2  MAKE-AHEAD TIP: At this point you can cover them with plastic wrap and refrigerate for up to 48 hours. 3  If frozen, thaw before baking.  Place UNCOVERED ribs in preheated 350 degree oven.
http://www.food.com/recipe/best-baby-back-ribs-in-town-57185
Bon Appetit recommends parboiling PORK ribs, and pre-roasting BEEF ribs (dredged in flour, paprika, salt & pepper) for about 45 min before roasting. Then, I put either one on a baking sheet (with a dry rub), covered with foil, and slow roast at 250-300 for about 2 hours.
https://answers.yahoo.com/question/index?qid=20080819150449AAd3gCd
1 MAKE-AHEAD TIP: After pre-cooking (baking or parboiling) ribs, they may be vacuum sealed and frozen for up to 3 months OR glazed with Rib Sauce and refrigerated or given their final baking immediately. **  BAKING RIBS (preferred method): Cut rack of ribs in half.
http://www.food.com/recipe/best-baby-back-ribs-in-town-57185
how long do you parboil ribs before grilling
You should parboil ribs for 45 minutes before grilling. Parboil ribs for 45 minutes before grilling. Before grilling, parboil ribs for 45 minutes.