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1
Prepare a medium-hot fire in a charcoal grill with a cover or preheat a gas grill to medium-high.
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2
For the sauce: Place the thawed pulp in a non-reactive (stainless steel or anodized aluminum) 3-quart fire-proof saucepan.
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3
Add the brown sugar, cumin, cayenne, and salt and mix well.
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4
Place the pan on the grill and let the mixture simmer for 10 to 15 minutes, stirring occasionally.
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5
The mixture will thicken and result in about 1 cup of sauce.
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6
Transfer the sauce to a small glass bowl and let it cool.
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7
The sauce may be made ahead of time and refrigerated until use.
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8
For the patties: Place the ginger and garlic in the bowl of a food processor.
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9
Pulse a few times until finely chopped.
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10
Place the oil in a medium-sized nonstick fire-proof skillet (cast iron).
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11
Place the skillet on the grill and let heat for a few minutes.
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12
Transfer the chopped garlic and ginger to the skillet and cook, stirring occasionally, until golden brown, just a few minutes.
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13
Add the garam masala and cayenne and cook until the mixture turns brown.
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14
Remove from the heat and set aside to cool for a few minutes.
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15
Add the salt and mix well.
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16
(Note: This step may be done stovetop.
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17
).
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18
Transfer the spice mixture to a large bowl.
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19
Add the ground beef and mix well.
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20
Divide the mixture into 6 equal portions and form 6 patties.
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21
Transfer the patties to a large baking dish and refrigerate.
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22
For the relish: Combine the onion, tomatoes, mint, salt, and lemon juice in a medium-sized glass bowl, mix well, and refrigerate.
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23
When the grill is ready, brush the grill rack with oil.
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24
Place the patties on the rack, cover, and grill for 3 to 4 minutes.
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25
Turn the patties over, cover, and grill for another 3 to 5 minutes or until done to your liking.
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26
Transfer the patties to a serving platter.
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27
Brush the cut sides of the buns with oil and grill them until lightly browned, 1 to 2 minutes.
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28
To assemble the burgers: Place enough lettuce to cover the browned side of the bottom buns.
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29
Spread about 2 tablespoons of the sauce on each of them.
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30
Add the patties and then add a few tablespoons of relish on each patty.
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31
Add the top buns and serve.