Preheat the oven to 425°F with a rack in the center of the oven.
Combine the eggs, milk, flour, vanilla, and salt in a bowl. Whisk until the batter is smooth. This can also be done in a blender.
Heat a cast-iron skillet or very heavy pan over medium-high heat. Add the butter and cherries and cook for about a minute.
Pour the batter into the center of the pan and transfer to the oven. Baker for about 20-25 minutes, or until the pancake is puffed.
For the Pecan Streusel
While the pancake is baking, make the streusel. Melt the butter in a pan over medium heat.
Stir in the pecans, oats, and flour, and mix to coat. Cook for about 5-10 minutes, or until golden and toasted. Set aside. This can also be made in advance.
To Serve the Cherry Dutch Baby
Slice the pancake and top with whipped cream, maple syrup. Sprinkle with the pecan streusel. If you prefer to swap the whipped cream with yogurt, this also tastes great. And of course, ice cream transforms this into a decadent dessert, too.