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1
Preheat oven to 375F (190C).
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2
Coat four 10 ounce ramkins (or a 2 quart souffle dish) with cooking spray and place on a baking sheet.
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3
Place broccoli in a microwave safe bowl.
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4
Cover and microwave until the broccoli is tender crisp, 1 to 2 minutes then set aside.
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5
Melt butter and oil in a large saucepan over medium-high heat.
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6
Stir in flour and cook stirring constantly for one minute.
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7
Adjust heat as needed to prevent the roux from getting too dark, it should be the color of caramel.
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8
Add milk, mustard, rosemary, and salt and cook, stirring constantly until thickened, about 1 to 2 minutes.
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9
Remove from heat and immediately whisk in the goat cheese and 3 egg yolks until combined.
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10
Transfer to a large bowl.
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11
Using an electric mixer in another bowl beat in the five egg whites on high speed until soft peaks form.
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12
Add cream of tartar and continue beating until stiff peaks form.
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13
Using a rubber spatula gently fold half the egg whites into the milk mixture.
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14
Gently fold in the remaining egg whites and the broccoli just until no white streaks remain.
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15
Transfer to the prepared ramkins or souffle dish.
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16
Bake until puffed, firm to the touch and an instant-read thermometer inserted into the center read 160 degrees F, about 20 minutes for ramkins and about 30 minutes in a souffle dish.
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17
Serve immediately.