Prepare the Dough:

• In a small bowl, dissolve the yeast in warm milk and let it sit for about 5 minutes until it becomes foamy.
• In a large bowl, combine the sugar, eggs, butter, and vanilla extract. Stir in the yeast mixture until well combined.
• Gradually add the flour and salt, mixing until a soft dough forms.
• Knead the dough on a floured surface for about 5-7 minutes until it is smooth and elastic.
• Place the dough in a greased bowl, cover, and let it rise in a warm place for about 1 hour, or until doubled in size.

 Prepare the Filling:

• In a medium bowl, mix together the cream cheese, sugar, and vanilla extract until smooth.
• Gently fold in the finely chopped strawberries and set aside. 

 Shape and Fry the Donuts:

• Once the dough has risen, punch it down and roll it out on a floured surface to about 1/2 inch thickness.
• Use a donut cutter or two round cutters (one large, one small) to cut out donut shapes.
• Heat oil in a deep fryer or large pot to 350°F (175°C).
• Fry the donuts in batches for 1-2 minutes per side, until golden brown.
• Transfer the donuts to a paper towel-lined plate to drain excess oil.

 Stuff the Donuts:

• Once the donuts have cooled slightly, use a piping bag with a small tip to fill each donut with the strawberry cheesecake filling.

 Coat the Donuts:

• In a small bowl, mix the sugar and cinnamon together.
• Roll each stuffed donut in the cinnamon sugar mixture until fully coated.