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1
Place ancho chilies in bowl.
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2
Cover with hot water; let stand until soft, about 1 hour.
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3
Drain.
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4
Coarsely chop chilies.
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5
Char bell peppers over flame or in broiler until blackened on all sides.
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6
Wrap in paper bag.
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7
Let stand 10 minutes.
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8
Peel, seed and quarter peppers.
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9
Puree ancho chilies, bell peppers, chicken broth, cilantro, garlic, jalapeno chilies, balsamic vinegar and cumin in processor.
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10
Season with salt and pepper.
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11
Preheat oven to 350F.
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12
Sprinkle pork with salt and pepper.
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13
Heat 1 tablespoon oil in heavy large pot over medium-high heat.
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14
Add pork and brown on all sides, about 10 minutes.
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15
Cover pot; place in oven and roast pork until tender, about 1 hour 15 minutes.
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16
Cool pork; chop coarsely.
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17
(Sauce and pork can be made 1 day ahead.
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18
Chill.)
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19
Melt butter with 2 tablespoons oil in another heavy large pot over medium-high heat.
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20
Add chopped onions and saute until translucent, about 6 minutes.
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21
Add potatoes and saute until beginning to brown, about 8 minutes.
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22
Stir in rutabagas and squash.
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23
Cover pot; reduce heat to medium-low and cook until all vegetables are tender, stirring frequently, about 30 minutes.
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24
Season filling to taste with salt and pepper.
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25
Butter large baking pan.
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26
Heat large nonstick skillet over medium-high heat.
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27
Add 1 flour tortilla to skillet and cook until beginning to brown, about 45 seconds per side.
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28
Transfer to plate.
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29
Spoon 1/2 cup pork in 4-inch-long log down center of tortilla.
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30
Spoon 1 1/2 tablespoons sauce over pork.
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31
Top pork with 1/3 cup vegetable mixture.
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32
Spoon 1 1/2 tablespoons sauce over vegetables.
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33
Sprinkle with 1 tablespoon cilantro.
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34
Fold tortilla sides over filling, then roll up to enclose completely.
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35
Place seam side down in prepared baking pan.
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36
Repeat with remaining tortillas.
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37
Cover with foil.
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38
(Burritos can be prepared 6 hours ahead; refrigerate.)
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39
Preheat oven to 350F.
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40
Bake burritos (covered) until hot, about 30 minutes.
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41
Serve burritos with remaining sauce.