Heat the 3 tablespoons of water in the microwave (does not need to be boiling, just hot). Put the saffron in the hot water and set aside.
Boil the pasta according to package directions.
When there is about 5 minutes left in the pasta cooking time, add the frozen peas. Do not drain the pasta water before reserving ½ cup of it.
Then immediately heat a large frying pan with the olive oil in it over medium low heat.
When the oil is hot, add the saffron infused water.
Scoop ½ cup of pasta water out of the pot the pasta is cooking in and add to the oil and saffron water. Mix in the ricotta and start stirring together. Do not turn the heat up any more.
Once the ricotta, oil, and water has emulsified, add the drained pasta to the frying pan (or if the pan isn't large enough, add the cheese sauce to the larger pot the pasta was boiling in). Keep on medium low heat while stirring together.
Add the pecorino cheese, reserving a few tablespoons for serving.
Add chopped mint, salt, and pepper to taste. Top with additional pecorino cheese. and serve immediately.